Fig 1. States and transitions in a multi-state model of incident mobility disability, incident parkinsonism, and risk of death.

This figure illustrates the frequencies of participants in each of the six states and nine transitions examined in a multi-state model of incident mobility disability, parkinsonism, and death. All participants included in this study did not show mobility disability or parkinsonism at the analytic baseline. During the course of this study, nine paths for transition were possible between the baseline state of no motor impairment, four intermediate states of varying degrees of motor impairment, and the final absorbing state of death.